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Captain, remember your breathing exercises. They're not worth it.
(startrek.website)
Star Trek memes and shitposts
Come on'n get your jamaharon on! There are no real rules—just don't break the weather control network.
Well, they're all basically locked in a submarine, but way worse. You're in a sealed box hurtling through space. You need a doctor on board, and you need a counselor on board. If you don't want both of them to go completely insane, both of them also need friends and social interaction.
While I agree that Starfleet levels of general fraternization are a lot looser than in modern military, I also think it's just kind of something you learn to live with when you serve on a ship.
I think we're, at least, led to believe that Starfleet officers are better adjusted than your average early 21st century human. For example, we don't see a lot of gossip behind Riker's back about how he gets around, but you very probably would today.
It may still not be ideal, but I think it would be less problematic than it would be for us.